Collision avoidance system using short pulse signal reflectometr

Details Collision avoidance system using short pulse signal reflectometr Collision avoidance system using short pulse signal reflectometr

1978-08-23

1981-03-03

Blum, Theodore M.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

340 47, G01S 302

Patent

active

042544181

ABSTRACT:
A collision avoidance system for rapid transit vehicles employing baseband radar principles in which signals with duration in the order of nanoseconds are transmitted down track along a surface wave transmission line. Reflections from a passive target located on the preceding vehicle are processed to establish the distance between the vehicles to within an accuracy previously unachievable.

REFERENCES:
patent: 2685068 (1954-07-01), Goubau
patent: 2702342 (1955-02-01), Korman
patent: 3377587 (1968-04-01), Nakahara et al.
patent: 3392388 (1968-07-01), Nakahara et al.
patent: 3408646 (1968-10-01), Simon et al.

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